13456217 has 4 divisors (see below), whose sum is σ = 13480116. Its totient is φ = 13432320.

The previous prime is 13456211. The next prime is 13456249. The reversal of 13456217 is 71265431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71265431 = 23 ⋅3098497.

It can be written as a sum of positive squares in 2 ways, for example, as 10883401 + 2572816 = 3299^2 + 1604^2 .

It is a cyclic number.

It is not a de Polignac number, because 13456217 - 2¹² = 13452121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13456217.

It is not an unprimeable number, because it can be changed into a prime (13456211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11084 + ... + 12237.

It is an arithmetic number, because the mean of its divisors is an integer number (3370029).

Almost surely, 2^13456217 is an apocalyptic number.

It is an amenable number.

13456217 is a deficient number, since it is larger than the sum of its proper divisors (23899).

13456217 is an equidigital number, since it uses as much as digits as its factorization.

13456217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23898.

The product of its digits is 5040, while the sum is 29.

The square root of 13456217 is about 3668.2716638766. The cubic root of 13456217 is about 237.8524672360.

The spelling of 13456217 in words is "thirteen million, four hundred fifty-six thousand, two hundred seventeen".